Abstract

The main and side products of hydroxylation by the C. lunata VKPM F-981 mycelium of fourteen delta(4)-3-ketosteroids of the estrane, androstane, and pregnane series and six of their delta(5)-3beta-hydroxy analogues were identified by H1 PMR spectroscopy and comparison with standard samples. The obtained experimental data are considered in terms of the triangular model of the enzyme-substrate interaction. The dependence of the direction of hydroxylation of steroid molecules and the orientation of hydroxy groups on the structure of the initial substrate was revealed.

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